参考博客
https://blog.csdn.net/strivenoend/article/details/79842836
注意：把 git remote add origin git@github.com:wangjiax9/beautifulDay.git 换成 git clone git@github.com:wangjiax9/beautifulDay.git
https://segmentfault.com/q/1010000012199096/a-1020000012200044